Moore on Twin Earth
Erkenntnis 75 (1):137-146 (2011)
| Abstract | In a series of articles, Terry Horgan and Mark Timmons have argued that Richard Boyd’s defence of moral realism, utilizing a causal theory of reference, fails. Horgan and Timmons construct a twin Earth-style thought experiment which, they claim, generates intuitions inconsistent with the realist account. In their thought experiment, the use of (allegedly) moral terms at a world is causally regulated by some property distinct from that regulating their use here on Earth; nevertheless, Horgan and Timmons claim, it is intuitive that the inhabitants of this world disagree with us in their moral claims. Since any disagreement would be merely verbal were the alleged moral facts identical to or constituted by different natural facts, the identity or constitution claim must be false. I argue that their argument fails. Horgan and Timmons’ thought experiment is underdescribed; when we fill out the details, I claim, we shall see that the challenge to moral realism fades away. I sketch two possible interpretations of the (apparently) moral claims of the inhabitants of moral Twin Earth. On one interpretation, they fail to disagree with us because they actually agree with us; on the other, they fail to disagree with us because they are not moralizers at all. Which interpretation is true, I argue, will depend on the facts that explain the differences between us and the inhabitants of moral twin Earth | |||||||||
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Andrea Viggiano (2008). Ethical Naturalism and Moral Twin Earth. Ethical Theory and Moral Practice 11 (2):213 - 224.
Michael Rubin (2008). Sound Intuitions on Moral Twin Earth. Philosophical Studies 139 (3):307 - 327.
Jorn Sonderholm (2013). Unreliable Intuitions: A New Reply to the Moral Twin-Earth Argument. Theoria 79 (1):76-88.
Michael Rubin (2013). On Two Responses to Moral Twin Earth. Theoria 79 (2).
Heimir Geirsson (2005). Moral Twin-Earth and Semantic Moral Realism. Erkenntnis 62 (3):353 - 378.
Terry Horgan & Mark Timmons (2009). Analytical Moral Functionalism Meets Moral Twin Earth. In Ian Ravenscroft (ed.), Minds, Ethics, and Conditionals: Themes from the Philosophy of Frank Jackson. Oxford University Press.
Terry Horgan & Mark Timmons (2000). Copping Out on Moral Twin Earth. Synthese 124 (1-2):139-152.
Lawrence Pasternack (2001). Internal Realism and Twin Earth. Idealistic Studies 31 (1):73-80.
Joshua Gert (2006). Problems for Moral Twin Earth Arguments. Synthese 150 (2):171 - 183.
Nick Zagwill (1997). Explaining Supervenience. Journal of Philosophical Research 22:509-518.
Terence Horgan & Mark Timmons (1992). Troubles on Moral Twin Earth: Moral Queerness Revived. Synthese 92 (2):221 - 260.
Jeff Wisdom (2009). A Defense of Descriptive Moral Content. Southern Journal of Philosophy 47 (3):285-300.
Derek Ball (2007). Twin-Earth Externalism and Concept Possession. Australasian Journal of Philosophy 85 (3):457-472.
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